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  <li><a href="http://simile.mit.edu/" title="Home">SIMILE</a></li>
  <li><span>Welkin</span></li>
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<h1>Welkin</h1>
<h2>What is this?</h2>
<p>Welkin is a graph-based <a href="http://www.w3.org/RDF/">RDF</a>
visualizer.</p>
<p class="figure"><img src="images/screenshot.gif" alt="Welkin Screenshot"/></p>
<h2>Ok, how do I run it?</h2>
<p>The easiest way is to <a href="http://simile.mit.edu/repository/welkin/latest/docs/welkin.jnlp" title="Run Welkin via Java WebStart">run Welkin thru Java WebStart</a>.</p>
<p>If the application doesn't start when you click the link above, you don't have Java WebStart installed in your machine. You can get it when you installed the latest version of the Java Runtime Environment from <a href="http://www.java.com/" title="Official Java Web Site">the official Java web site</a>.</p>
<h2>Cool, now what?</h2>
<p>Welkin visualizes RDF models and currently supports only the RDF/XML syntax (but we'll be supporting other syntaxes too, don't worry). If you want to test it with some data, you can start with <a href="http://simile.mit.edu/repository/welkin/latest/data/" title="Test Data">these graph fragments</a> taken from our of our digital library collection.</p>
<p>A word of warning: above 1000 nodes, real-time drawing performance degrades dramatically even on beefy machines. We suggest you not to load more than 1Mb of RDF; if you have more, consider splitting it up for now. In future versions, we'll be targeting ways to allow you to work on much bigger graphs.</p>
<h2>Where do I download it?</h2>
<p>You can obtain Welkin in two different ways:<br>
</p>
<ol>
  <li>download a <a href="http://simile.mit.edu/dist/welkin/">prepackaged
distribution</a><br>
  </li>
  <li>download the files directly from the code repository.</li>
</ol>
<p>In case you want to download the files from the repository (for
example, if you want to have the latest and greatest development
snapshot), you need to have a <a href="http://subversion.tigris.org/">Subversion</a>
client installed. At this point, just type</p>
<pre>svn co http://simile.mit.edu/repository/welkin/trunk/ welkin</pre>
<p>at the command line and the latest welkin distribution will appear
in the "welkin" directory.</p>
<h2>Licensing and legal issues</h2>
<p>Welkin is open source software and is licensed under the BSD
license located in the LICENSE.txt file located in the root of the
distribution.</p>
<p>Note however, that this software ships with libraries that are not
released under the same license, that we are redistributing them
untouched and each of them are licensed according to the terms of the
license files located in the ./legal subdirectory of the distribution.</p>
<h2>Credits</h2>
<p>This software was created by the SIMILE project and originally
written by:</p>
<ul>
  <li><a href="http://www.betaversion.org/%7Estefano/">Stefano Mazzocchi</a>
&lt;stefanom at mit.edu&gt;</li>
  <li><a href="http://www.labmedinfo.org/people/cv/ciccarese.htm">Paolo Ciccarese</a>
&lt;paolo at hcklab.org&gt;</li>
</ul>
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